Lock.



No. 7l|,040. Patented Oct. I4, |902.

G. DE CESARE.

LUCK.

(Application led Dec. 31, 1901.) (No Nudel.) 4 Sheets-Sheet l` PatentedOct. I4, |902. G. DE CESARE. l

No. 71|,04o.

L0 C K.

(Application led Dec. 31, 1901.)

4 Sheets-Shack 2` (No Model.)

Tij: NDRmS FEYERS C0. PHOYQTHO.. WASHINGON. D4 C.

No. 711,040. Patented Oct. I4, |902.

G. DE CESARE.

LOCK.

(Application filed Dec. 31, 1901.)

(No Model.) 4 Sheets-Sheet 3.

of 6, I

c Nonm nuns ou, Pnormuwo.. wAsHmmuN n r,

Patented Oct. i4, |902.

G. DE CESARE.

No. 7ll.040y

LOCK.

(Application led Dec. 31, 1901.)

4 Sheets-Sheet 4,

(No Model.)

Inversion e; me

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UNITED STATES PATENT OEEIcE.

GIUSEPPE DE CESARE, OF NEV YORK, N. Y., ASSIGNOR OF ONE-HALF TO GIUSEPPETUOTI, OF NEWv YORK, N. Y.

LOCK.

SPECIFICATION forming part of Letters Patent No. 711,040, dated October14, 1902.

Application led Deoember'Sl, 1901. Serial No. 87,886. (No model.)

To all whom t may concern: parts carried thereby, this View representingBe it known that I, GIUSEPPE DE CESARE, the lock-plate as if it had beenturned down a citizen of the United States, residing in the from thelock-case shown in Fig. 5. Fig. 7 borough of Manhattan, city of NewYork, is a View in vertical section on the plane in- 55 State of NewYork, have invented certain dicated bythe line 77 of Figs. 2 and 4. Fig.

new and useful Improvements in Locks, of 8 is a detail view in sectionon the plane inwhich the following is a specification, referdicated bythe line 8 8 of Figs. 4 and 5. ence being had to the accompanying draw-In the embodiment of the invention repreings, forming a part hereof.sented in the drawings the lock-case A is 6o 1o The objects of thisinvention are to increase represented as a rectangular case of suit-ablethe strength and the certainty of action of the depth to receive themechanism of the lock. bolt mechanism,to provide safeguards against Thelock-plate B is fitted' within the wall of tampering with the lock inany way, to prothe case and is held therein by screws l),which vide forthe indication of sufficient movement preferably enter the door or otherpart to 6l. of the bolt in either direction, and generally which thelock may be applied, as represented to improve the construction of locksof the in Fig. 2. In order that the unauthorized regeneral class towhich the invention relates. moval of the lock by withdrawing the screwsThe several features of improvement will l) may be prevented, the headsof the screws be fully described hereinafter with reference areconcealed by the cover-plate b', which is 7o 2o to the accompanyingdrawings, in which for slipped over the lock-plate B, its edges enthepurposes of illustration and explanation tering undercut grooves a,formed in the of the mechanism of the invention such feawalls of thecase, as clearly shown in Figs. 2 tures of importance are represented asem-l and 7. The cover-plate in turn is held from bodied in a convenientand practical form. withdrawal by the spindle O of the latch-bolt, 75 Itwill be obvious as this description prowhich passes through the lockfrom side to ceeds that some of the features of improveside, havingfixed upon one endthereof the ment are capable of use in other forms ofknob c and having connected therewith on locks than that shown in thedrawings and the other end the knob c'. The bolt-socket D are alsocapable of use independently of one is likewise secured to the jamb ofthe door or 8o 3o another. other corresponding part in such a manner Inthe drawings, Figure l is a View in eleas to prevent its unauthorizedremoval. For vation of the portion of the door and doorthis purpose itis preferably formed as an injamb to which the lock is applied, showingtegral casting, except as hereinafter menthe handle of the latch-boltand the key-plate, tioned, and is provided with an undercut edge 8 5'the outline of the lock-case and of the boltl to engage with acorresponding undercut socket being indicated by dotted lines. Fig. edgee of the socket-plate E, the latter being 2 is aview of the lock andbolt-socket as seen secured to the jamb of the door or other corfromabove in Fig. l, the door and door-jamb responding part by screws e'before the boltbeing shown in section and portions of the socket isslipped into engagement therewith, 9o 4o lock-case and bolt-socket beingbroken out which is done when the door is open. The to show details ofconstruction. Fig. 3 is a heads of the screws e' are thus covered by theview in elevation from the side opposite to bolt-socket, so that theyare not accessible that shown in Fig. l, a portion of the lock when thedoor is closed and locked. To pei'- cover-plate and of the bolt-socketbeing mit the placing ofthe bolt-head and other 95 p broken out. Fig. 4is a view in vertical secparts contained within the bolt-socket, asection on the plane indicated by the line 4 4 of tion d of thesocket-wall is made removable, Fig. 2. Fig. 5 is a-view in elevation ofthe its ends being beveled to fit the corresponding lock-case with theparts carried thereby, the edges of the wall, as shown clearly in Fig.4. lock-plate being removed and part of the cir This removable sectionis slipped in place beioo 5o cular flange being broken away. Fig. 6 is afore the socket is applied to the socket-plate,y view in elevation ofthe lock-plate with the its upper edge engaging the outer wall of thesocket, while its lower edge is protected by the fiange of thesocket-plate E.

The keyhole through the door or other corresponding part is providedwith a metallining G, havingatits innerend a flange g,which is coveredby a lock-case, thus holding the lining securely in position. Theescutcheon H is secured to the keyhole-lining by revoluble studs h, eachof which has at its inner end a lug h to engage a corresponding notch inthe end of the keyhole-lining G. One of these removable studs may bemade the pivot of the keyhole-cover h2, while the other may 'be formedat its outer end for engagement of a spanner, as clearly indicated inFigs. l and 7. Y

The bolt mechanism, which will now be described, is shown in Figs. a, 5,6, 7, and 8. A circular ange I is preferably formed integral with thelock-case, concentric with the eye of the keyhole, having at a suitablepoint therein one or more slots or notches t'. A pin K is secured to thelock-plate B, concentric with the ange I, to enter the hollow end of thekey L (shown in Fig. 7) in the usual inanner to center and steady thesame, the pin having secured thereto suitable wards la to coperate withthe clefts of the key. A worin- Wheel M or drum having a worm formed onits outer peripheryis mounted rotatably upon the pin K, having lugs or anotched `ring formed thereon, as indicated at m in Fig. 6, forengagement with the web of the key, so that said Worm-Wheel ordrum canbe rotated by means of a key When the latter is properly inserted.Pivoted within the flange I are the tumblers N, carrying cams 'n2 forengagement with a key, and which are preferably held in normal positionby a spring n, the lug n of each tumbler passing through the slot ornotch t' in the Iixed ange I int-o engagement with a notch m', formed inthe drum or worm-Wheel M, so that such drum or Worm-wheel cannot berotated until the tumblers have been operated by the proper key torelease the same.

The worm-Wheel M engages the long gearteeth o of the longitudinallymovable and rotatable boltO,whichisthreaded,as at 0,foren gagement witha fixed nut 02, carried by the lock-case. The rear end o3 of the bolt Ois supported in a suitable bearing and may be threaded therein, asrepresented in Figs. 4 and 6. Within the bolt-socket is mounted abolt-head P, Which is interiorly threaded, as at p, for engagement withthe threaded end of the bolt O when it is projected, the bolthead beingheld from rotation by any suitable means, as by having its shankpolygonal in cross-section to fit in a corresponding aperture formed inthe front wall of the boltsocket. A spring p' may be applied to theshank bolt-head, thrusting against a shoulder p2 thereon, to press thebolt-head back into the socket, so that its shank shall not projectbeyond the front wall of the socket when the door is open. It will beunderstood that when the drum or worm-Wheel is rotated in the manneralready described the bolt O will also be rotated and by means of itsthreaded engagement with the lock-case will at the same time beadvanced, so that the bolt will enter and engage the bolt-head, therebylocking the door. At the same time the bolt-head will be drawn outwarduntil it impinges closely upon the lock-case, thereby making itimpossible to reach the bolt itself with any implement.

Means are provided for indicating when the bolt has been movedsufficiently in either direction. As shown in Figs. 4 and 6, such meanscomprise a gong Q, supported within the lock-case, two hammers R beingsuitably supported in the lock-case to cooperate with the gong, the tailof each hammer projecting into the path of a corresponding lug lr,carried with the bolt O in its longitudinal movement. The lugs rareformed, preferably, on a ring lr', which is hung loosely on the end of abolt O, the Weight of the lugs causing the ring to stand always in theproper position, so that the lugs shall strike the tails of the hammers.It will be observed by reference to Fig. 4 that the tails of the hammersare diderently disposed, so that one hammer shall be operated as thebolt reaches the limit of its forward movement and the other as the boltreaches the limit of its rearward move ment.

The mode of operation of the locking mechanism has been alreadydescribed sufficiently and will require no,further explanation here. Itwill now be obvious that various changes in the form and construction ofthe various parts of the improved lock may be made without departingfrom the spirit of the invention and also that some of the features ofimprovement described herein are capable of use independently of theother features.

I claim as my inventionl. In a lock, the combination of a screwthreadedbolt having longitudinal grooves forming long gear-teeth thereon, afixed nut for said bolt, and a key-operated Worm-wheel operativelyengaging said gear-teeth to rotate said bolt while permittinglongitudinal movement thereof, substantially as described.

2. In a lock, the combination of a screwthreaded bolt, means to rotateand advance said bolt, a bolt-socket, and a bolt-head having aninteriorly-threaded shank to be engaged by said bolt, substantially asdescribed.

In a lock, the combination of a screwthreaded bolt, means to rotate andadvance the same, a bolt-socket, a bolt-head having aninteriorly-threaded shank to be engaged by said bolt, and a spring topress said bolt-head normally into the socket, substantially asdescribed.

4. In a lock, the combination of a screwthreaded bolt havinglongitudinal grooves forming long gear-teeth thereon, a key-oper- IOOIIO

ated worm-Wheel engaging said gear-teeth,

and tumblers engaging said Worm-Wheel to prevent rotation thereof.

5. In a lock, the combination of a bolt, a key-operated drum inengagement with said bolt, and tumblers pivoted Within and en gagingsaid drum to prevent rotation thereof, substantially as described.

In a lock, the combination of a case, a bolt, a key-operated drum inoperative engagement With said bolt, a circular flange fixed upon thecase and inclosed by said drum, and tumblers pivoted upon said flangeand engaging said dru 1n to prevent rotation thereof, substantially asdescribed.

7. In alock, the combination of a case having a Xed nut, ascrew-threaded bolt engaging said nut and having long gear-teeth, akeyoperated Worm Wheel engaging said gearteeth, and tumblers engagingsaid Worm- Wheel to prevent rotation thereof, substantially asdescribed.

8. In a lock, the combination of a case having a fixed nut, ascrew-threaded bolt engaging said nut and havinglong gear-teeth, akeyoperated Worm Wheel engaging said gearteeth, a circular flange fixedon the case, and tuinblers pivoted on said flange and engaging saidWorin-Wheel to prevent rotation thereof, substantially as described.

9. The combination With alock-case, a lockplate, fastening devicespassing throu gh the plate and case, and a cover-plate engaging the caseand covering the fastening devices, of a circular Iiange fixed upon thecase, a bolt, a key-operated drum in operative engagement With said boltand inclosing said fiange, and a tumbler pivoted upon said fiange andengaging said drum to prevent rotation thereof, substantially asdescribed.

IO. The combination with alock-case, a circular flange fixed upon saidcase, a bolt, a

key-operated drum in operative engagement with said bolt and inclosingsaid ange, and tumblers pivoted on said flange and engaging said drum toprevent rotation thereof, of a keyhole-lining having at one end a flangeto be covered by the lock, an escutcheon, a removable stud carried bysaid escutcheon, and a lug to engage a slot formed in the keyholelining,substantially as described.

ll. In a lock, the combination of a case, a bolt, a key-operated drum inoperative engagement with said bolt, a circular ange fixed upon saidcase and inclosed by said drum, and a tumbler pivoted upon said flangeand carrying a lug, said drum having a notch which is engaged by saidlug to prevent the rotation of the drum, substantially as described.

l2. In a lock, the combination of a case, a bolt, a key-operated drum inoperative engagement with said bolt, a circular flange fixed on saidcase and inclosed by said drum, and a tumbler pivoted upon said fiangeand carrying a lug and a cam adapted to be operatively engaged by a key,said drum having a notch which is engaged by said lug to prevent therotation of the drum until the cam is operatively engaged by the key tocause said lug to release the drum, substantially as described.

13. In a lock, the combination of a case, a bolt, a drum in operativeengagement With said bolt and provided With a lug for engagement With akey, a circular flange fixed upon the case and inclosed by said drum,and tumblers pivoted upon said flange and engaging said drum to preventrotation thereof, substantially as described.

This specification signed and witnessed this 23d day of December, A. D.1901.

GIUSEPPE DE CESARE.

In presence of- ANTHONY N. JESBERA, Lucius E. VARNEY.

